Asymmetrella longitubulosa Gorochov, 2022

Gorochov, A. V., 2022, Taxonomy of Podoscirtinae (Orthoptera: Gryllidae). Part 15: Asymmetrella gen. n., Zvenellomorpha and Ultratrella from Madagascar, Russian Entomological Journal 31 (3), pp. 218-229 : 219-222

Asymmetrella longitubulosa Gorochov , sp.n.

Figs 1–15 .

MATERIAL EXAMINED. Holotype — ♂, Madagascar, Toamasina Prov., Moramanga Distr., Analamazaotra Forest Station near Andasibe Vill ., ~ 900 m, on leaf of bush in forest at night, 8–20.III.2013, A. Gorochov ( ZIN) . Paratypes: 1 ♂, same data as for holotype ( ZIN) ; 1 ♂, same province and district, ~ 10 km NW of Andasibe Vill., Torotorofotsy Forest Reserve , ~ 1000 m, on leaf of small tree in forest at night, 22.II– 11.III.2013, A. Gorochov ( ZIN) .

DESCRIPTION. Male (holotype). Body coloration light greyish with numerous darker marks: eyes light yellowish brown with four longitudinal brownish grey stripes; upper half of epicranium with a pair of dark brown lines along dorsal edges of antennal cavities, a few brown areas along anterior edge of pronotal disc, and several small brown to dark brown spots near rostral apex and on epicranial dorsum between eyes as well as on genae under eyes; mouthparts very light with barely darkened areas on two apical segments of maxillary palpi and on apex of labrum; antennae light with a few dark marks on dorsal half of scape, rather numerous darkish and lightish spots on proximal third of flagellum, and almost uniformly light brown rest of flagellum; pronotum also light with several dark brown spots on disc ( Figs 1–4 ); pterothorax and abdomen light brown with brown transverse band on last abdominal tergite as well as a few lateral marks on anal plate (as in Fig. 10 ); legs light grey with rather sparse small brown to dark brown spots on fore femora and tibiae as well as with larger similar spots on middle and hind femora, tibiae and tarsi; tegmina with semitransparent dorsal field having whitish and light grey marks, and with whitish lateral field having light greyish brown veins and large areas on membranes between Sc branches (areas between proximal half of Sc and dorsal field greyish brown with whitish crossveins; Figs 5–8 ); hind wings light yellowish grey; cerci light with numerous small dark marks on proximal parts and somewhat less numerous slightly darkened spots on other cercal parts. Outer tympanum almost 1.2 times as long as width of fore tibia and rather wide (fore tibia approximately 1.4 times as wide as this tympanum); inner tympanum slightly smaller but similar in shape ( Figs 5–6 ). Tegmina: dorsal field with 4–5 oblique veins (two medial ones almost straight, others more or less curved) and with longitudinal mirror which clearly longer than diagonal vein and than apical area as well as having one obliquely transverse dividing vein; lateral field with 12–13 oblique and slightly curved branches of Sc ( Figs 7–8 ). Anal and genital plates as in Fig. 10 ; genitalia with rather high and short epiphallus having six apical tubercles (a pair of ventroapical ones, and two pairs of dorsoapical tubercles: larger distal pair and smaller but more acute subdistal one) and small notch between them, with large arcuate rachis having strongly widened proximal part and thin (spine-like) apical part, with hook-like distal parts of elongate ectoparameres, and with asymmetrically V-shaped formula having a pair of semisclerotized plates dorsally and characteristic heavily sclerotized ribbon anteriorly ( Figs 11– 13, 15 ); spermatophore as in Fig. 14 .

Variations. Paratype from Torotorofotsy Forest Reserve with less numerous darkened spots on head dorsum and on pronotal disc (these pronotal spots partly fused with each other and forming a pair of arcuate lateral stripes on disc) as well as without distinct darkenings on abdominal apex (i.e. on last tergite and anal plate). Other paratype with dorsum of head and pronotal disc slightly darkened (small darkened spots on these surfaces almost indistinct), lateral pronotal lobes having rather numerous darkened dots, legs less distinctly spotted (these spots smaller, lighter, more numerous and forming almost finely reticular pattern on outer surfaces of hind femora; thus, these femoral surfaces looking only slightly darkened), tegmina having slightly shorter basal area ( Fig. 9 ), and genitalia practically lacking anterior sclerotized ribbon of formula.

Female unknown.

Length in mm. Body 14–15.5; body with wings 15.5– 16.5; pronotum 2.7–2.9; tegmina 10.5–12; hind femora 11– 12.5.

COMPARISON. The new species differs from the other related taxa by the characters given in the generic diagnosis.

ETYMOLOGY. This species name consists of the Latin prefix “longi-“ (long) and the Latin word “tubulosa” (tubular) due to a very long tube of the spermatophore.

Genus Zvenellomorpha Gorochov, 2004 NOTE. In this genus, some rather different species are here included. They are divided into three groups. The first group includes one species having its general appearance more or less similar to that of Asymmetrella gen. n., but its male genitalia are very similar to those of Zvenellomorpha s. str., whereas those of Asymmetrella gen. n. are more similar to the male genitalia of Ocellotrella . Possibly the above-mentioned similarity to Asymmetrella gen. n. is connected with a similar mode of life: the both sit on the leaves of bushes or trees at night but probably on the bark of branches and trunks at daytime (the similarity in their general appearance, therefore, may be due to the same way of simulating the unevenness of the bark). The second and third groups have a very similar general appearance (without any simulating the bark unevenness) but a rather different structure of the male genitalia. These groups are here described as subgenera (see the subgeneric key below).

A KEY TO SUBGENERA OF ZVENELLOMORPHA S. L.

1. Body moderately large (lengths of pronotum 3.6 mm); all ocelli distinct (significantly convex), medium-sized (approximately equal to each other in size) and almost round ( Fig. 28 ); pronotum strongly narrowing to head, strongly depressed dorsoventrally and with slight but distinct longitudinal keels on lateral lobes (these keels more or less similar to those of Asymmetrella gen. n.; Figs 31, 33 ); outer and inner tympana well developed ( Figs 29–30 ); fore and middle femora as well as middle tibiae somewhat widened and strongly depressed laterally(they more strongly depressed than even in Asymmetrella gen. n. and with keel-like dorsal longitudinal edges on femora; Figs 31– 33 ); male tegmina with well developed stridulatory apparatus having large longitudinal mirror in dorsal field ( Fig. 32 ); male genitalia having rather long ventroapical epiphallic lobules and bifurcate dorsoapical epiphallic processes, long ectoparameres and rachis, and formula almost as in Asymmetrella gen. n. with long anterior sclerotized ribbon but completely symmetrical ( Figs 34–36 ) .............. ........................................ Euzvenellomorpha subgen.n.

— Body moderately small (lengths of pronotum 2.1–3.4 mm); all ocelli poorly distinct (insignificantly convex), but middle ocelli medium-sized or small as well as barely or slightly elongate, and median ocellus small and round or obliterate ( Figs 42–43 , 49 ); pronotum slightly narrowing to head, moderately depressed dorsoventrally and without keels on lateral lobes ( Figs 38–39, 42–43 , 47–48 ); fore and middle femora as well as middle tibiae not widened and slightly depressed laterally as well as without dorsal keels on femora ( Figs 38–39, 42–43 , 47–48, 56 ); male tegmina with partly reduced stridulatory apparatus having medium-sized or moderately small mirror of different shape in dorsal field ( Figs 40–41 , 51, 56 ); male genitalia rather diverse ( Figs 16–23, 25–26 , 52–54 ) ................. 2

2. Median ocellus very small and round or obliterate; outer and inner tympana well developed; male genitalia similar to those of Euzvenellomorpha subgen.n. but with distinctly shorter rachis and anterior sclerotized ribbon of formula (this ribbon in shape of rather wide but poorly distinct semimembranous plate; Figs 16–23, 25 ) .......... .................................................... Zvenellomorpha s. str.

— Median ocellus obliterate; inner tympanum well developed, but outer one obliterate; male genitalia with rather short but hook-like ventroapical epiphallic lobules and almost non-bifurcate dorsoapical epiphallic processes, ectoparameres and rachis much shorter than in Euzvenellomorpha subgen.n., and formula more similar to that of this subgenus than to that of Zvenellomorpha s. str. ( Figs 26 , 52–54 ) ........................ Azvenellomorpha subgen.n.

Figures

Figs 1–9. Asymmetrella longitubulosa sp.n., males: 1 — body from side (tegmina spread); 2 — head and one fore leg in front; 3 — head with pronotum and one fore leg from above; 4 — posterior part of pronotum and metanotal gland from above; 5–6 — inner (5) and outer (6) tympana; 7–9 — left (7) and right (8–9) tegmina; 1–8 — holotype; 9 — paratype. Рис. 1–9. Asymmetrella longitubulosa sp.n., самцы: 1 — тело сбоку (надкрыльЯ расправлены); 2 — голова и одна переднЯЯ нога, спереди; 3 — голова с переднеспинкой и одной передней ногой, сверху; 4 — ЗаднЯЯ часть переднеспинки и метанотальнаЯ желеЗа, сверху; 5–6 — внутренний (5) и наружный (6) тимпанумы; 7–9 — левое (7) и правое (8–9) надкрыльЯ; 1–8 — голотитп; 9 — паратип.

Figs 10–27. Structures of abdomen, male: 10–15 — Asymmetrella longitubulosa sp.n.; 16 — Zvenellomorpha (Zvenellomorpha) bella Gor.; 17–18 — Z. (Z.) recta Gor.; 19–23 — Z. (Z.) intermedia sp.n.; 24 — A. sp.; 25 — Z. (Z.) sp.; 26 — Z. (Azvenellomorpha) sp.; 27 — Ultratrella sp.; 10 — abdominal apex from above; 11–13, 16–17, 19–21 — genitalia (11, 20 — from above; 12, 21 — from below; 13, 16– 17, 19 — from side); 14 — spermatophore from side, reconstruction; 15 — formula with rachis, endoparamere and ectoparamere from below; 18, 22 — formula from below; 23 — distal part of genitalia from side; 24–27 — scheme of sagittal section of formula [brown], of its sclerotized anterior ribbon [green] and of nearest portion of spermatophore tube [red]; 10, 23 — paratype; 11–22 — holotypes [16, 17 — after Gorochov, 2004, 2006.]

Figs 28–37. Zvenellomorpha (Euzvenellomorpha) carinata sp.n., male: 28 — head in front; 29–30 — outer (29) and inner (30) tympana; 31 — head with pronotum and fore legs from above; 32 — wings with middle and partly hind legs from above; 33 — body from side; 34– 36 — genitalia (34 — from side; 35 — from above; 36 — from below); 37 — spermatophore from side, reconstruction. Рис. 28–37. Zvenellomorpha (Euzvenellomorpha) carinata sp.n., самец: 28 — голова, спереди; 29–30 — наружный (29) и внутренний (30) тимпанумы; 31 — голова с переднеспинкой и передними ногами, сверху; 32 — крыльЯ со средними и частично Задними ногами, сверху; 33 — тело, сбоку; 34–36 — гениталии (34 — сбоку; 35 — сверху; 36 — сниЗу); 37 — сперматофор, сбоку, реконструкциЯ.

Figs 38–46. Zvenellomorpha (Zvenellomorpha) intermedia sp.n.: 38–39, 42–43 — head with pronotum and fore legs (38 — from above; 39 — from side, 42–43 — from side/above); 40–41 — tegmina in rest position from above; 44 — genital plate from below; 45–46 — distal part of ovipositor (45 — from side; 46 — from above); 38–42 — male (38–40 — holotype; 41–42 — paratype); 43–46 — female. Рис. 38–46. Zvenellomorpha (Zvenellomorpha) intermedia sp.n.: 38–39, 42–43 — голова с переднеспинкой и передними ногами (38 — сверху; 39 — сбоку; 42–43 — сбоку/сверху); 40–41 — надкрыльЯ в положении покоЯ, сверху; 44 — генитальнаЯ пластинка, сниЗу; 45–46 — дистальнаЯ часть Яйцеклада (45 — сбоку; 46 — сверху); 38–42 — самец (38–40 — голотип; 41–42 — паратип); 43– 46 — самка.

Figs 47–59. Zvenellomorpha (Azvenellomorpha) separata sp.n.:47–48 — head with pronotum and fore leg (47 — from side; 48 — from above); 49 — head in front; 50 — anal plate from above; 51 — right tegmen; 52–54 — genitalia (52 — from side; 53 — from above; 54 — from below); 55 — spermatophore from side; 56 — wings with middle leg and antennal part in rest position from above; 57 — genital plate from below; 58–59 — distal part of ovipositor (58 — from below; 59 —from side); 47–56 — male (47–55 — holotype; 56 — paratype); 57– 59 — female. Рис. 47–59. Zvenellomorpha (Azvenellomorpha) separata sp.n.:47–48 — голова с переднеспинкой и передней ногой (47 — сбоку; 48 — сверху); 49 — голова, спереди; 50 — анальнаЯ пластинка, сверху; 51 — правое надкрылье; 52–54 — гениталии (52 — сбоку; 53 — сверху; 54 — сниЗу); 55 — сперматофор, сбоку; 56 — крыльЯ со средней ногой и частью антенны в положении покоЯ, сверху; 57 — генитальнаЯ пластинка сниЗу; 58–59 — дистальнаЯ часть Яйцеклада (58 — сниЗу; 59 — сбоку); 47–56 — самец (47–55 — голотип; 56 — паратип); 57–59 — самка.